you are right $2000 in sask and AB with second offence up to $5000 (these are fines up to so I guess it depends on how good your lawyer is)
i could be wrong but i'm thinking the fine for trespassing on farm land is in the neigbourhood of $2000. the sledders where in the wrong, yes, gun toter, was violent and flashing gun around, the situation could have become deadly in a hurry. he had other options rather than use a gun. not a good situation, been there, no hurry to repeat.